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Displaying 54101 - 54125 of 74067

Permittivity Characterization from Transmission-Line Measurement

June 1, 1997
Author(s)
Michael D. Janezic, Dylan F. Williams
We analyze three accurate broadband techniques for measuring the complex permittivity of dielectric substrates using coplanar waveguide transmission-line measurements and demonstrate good agreement with single-frequency cavity measurements.

Prototype FDMS Database for Model Verification (NISTIR 6030)

June 1, 1997
Author(s)
Rebecca W. Portier, Richard Peacock, Walter W. Jones
Fire Data Management System, FDMS, is a system designed to store and retrieve fire test results obtained from bench-scale and real-scale tests as well as fire simulation programs. By storing available fire test values in a common format, this data is

RF Power Dependence Study of Large Area YBCO Thin Films

June 1, 1997
Author(s)
Z Ma, E. I. DeObaldia, G. Hampel, P. A. Polakos, P. M. Mankiewich, B. Batlogg, W. Prusseit, H. Kinder, Angela Anderson, D. E. Oates, Ronald H. Ono, James A. Beall
In an effort to develop HTS superconducting filters with sufficient power handling capability for PCS (Personal Communication Services) base station transmit applications, we have undertaken a study of the power dependence of large area YBCO thin films on

State Models for Jobs and Job Supervisors

June 1, 1997
Author(s)
David Flater, Edward J. Barkmeyer Jr., Evan K. Wallace
Intelligent control of discrete parts manufacturing jobs and machinery requires state models for the jobs and the controllers. Different approaches to control have yielded different state models. While a dominant model is yet to emerge, the advantages and

Superconducting Microcalorimeter X-ray Spectrometers

June 1, 1997
Author(s)
John M. Martinis, David A. Wollman, Kent D. Irwin, Gene C. Hilton
A revolutionary advance in x-ray microanalysis will occur in the next few years due to the development of new x-ray spectrometers based on microcalorimeters. These detectors will be similar in operation to commonly-used energy dispersive spectrometers (EDS

Surface resistance and morphology of YBCO films as a function of thickness

June 1, 1997
Author(s)
F. J. Stork, James A. Beall, Alexana Roshko, Donald C. DeGroot, David A. Rudman, Ronald H. Ono, Jerzy Krupka
We have examined the thickness dependence of the growth morphology and surface resistance Rs of laser ablated YBa 2Cu 3O 7-x films with transition temperatures over 89 K and critical current densities greater than 10 6 A/cm2 at 76 K. The thickness was

Test Fire Signatures and the Fire-Emulator/Detector-Evaluation (NISTIR 6030)

June 1, 1997
Author(s)
William L. Grosshandler, Thomas G. Cleary
Existing methods for evaluating the performance of smoke and thermal detectors are reviewed. The levels of combustion gases, smoke, temperature and velocity likely to be produced in the European standard detector test fires are discussed, and this

The NIST/EPA/NIH mass spectral database: simultaneous control of quality and quantity

June 1, 1997
Author(s)
S G. Lias, Anzor I. Mikaia, O D. Sparkman, Stephen Stein, Vladimir G. Zaikin
Achievements in the development of the NIST/EPA/NIH mass spectral library is reported. Statistical data on the content of the library is presented,the quality control procedures are described, the roles of computer methods and manual procedures in data

Experimental Observations of PMMA Spheres Burning at Reduced Gravity

May 19, 1997
Author(s)
Jiann C. Yang, Anthony P. Hamins, M Glover, M D. King
Polymer combustion is a very complicated process which involves the coupling of gas-phase combustion, melting, pyrolysis and possible charring of the condensed phase. Although only a few studies on the combustion of a spherically shaped polymer have been
Displaying 54101 - 54125 of 74067
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